/// <summary>
/// Returns true if the provided CombatEntity has enough resources to use an Ability.
/// </summary>
/// <param name="attacker">The attacking CombatEntity.</param>
/// <param name="ability">The ability being used by the CombatEntity.</param>
/// <returns></returns>
private bool HasEnoughResources(CombatEntity attacker, Ability ability, out string failureReason)
{
failureReason = "";
int actionPointCost = ResourceCalculator.GetTotalActionPointCost(attacker, ability);
int manaCost = ResourceCalculator.GetTotalManaCost(attacker, ability);
int healthCost = ResourceCalculator.GetTotalHealthCost(attacker, ability);
if (attacker.Resources.CurrentActionPoints < actionPointCost)
{
failureReason = BattleErrorWriter.WriteInsufficientActionPoints(attacker, ability);
return(false);
}
if (attacker.Resources.CurrentMana < manaCost)
{
failureReason = BattleErrorWriter.WriteInsufficientMana(attacker, ability);
return(false);
}
if (attacker.Resources.CurrentHealth < healthCost)
{
failureReason = BattleErrorWriter.WriteInsufficientHealth(attacker, ability);
return(false);
}
return(true);
}
/// <summary>
/// Performs an ability on a target location, applying damage, healing, and status effects to any targets.
/// </summary>
/// <param name="attacker">The attacker performing the ability.</param>
/// <param name="ability">The ability used to attack the enemy.</param>
/// <param name="targetPosition">The position to target with the ability being used.</param>
/// <param name="targetFormation">The Formation that the CombatEntity is targeting with its action.</param>
/// <returns></returns>
public AbilityResult PerformAbility(CombatEntity attacker,
Ability ability,
int targetPosition,
Formation targetFormation)
{
var result = new AbilityResult();
// Target position is out of bounds
if (!ability.IsPointBlank && !ability.IsPositionStatic &&
(targetPosition > 9 || targetPosition < 1))
{
result.FailureReason = BattleErrorWriter.WriteTargetPositionOutOfBounds();
return(result);
}
if (!HasEnoughResources(attacker, ability, out string failureReason))
{
result.FailureReason = failureReason;
return(result);
}
if (ability.IsPointBlank)
{
targetPosition = GetTargetPosition(attacker, targetFormation);
}
var targets = FormationTargeter.GetTargets(ability, targetPosition, targetFormation).ToList();
if (targets == null || targets.Count == 0)
{
result.FailureReason = BattleErrorWriter.WriteNoTargets();
return(result);
}
// Filter out all dead targets
targets = targets.Where(entity => entity != null && entity.Resources.CurrentHealth > 0).ToList();
// Will be an invalid Ability usage if all targets are dead (later on will add ability to revive)
if (targets.Count == 0)
{
result.FailureReason = BattleErrorWriter.WriteAllTargetsAreDead();
return(result);
}
ConsumeResources(attacker, ability);
ApplyEffects(attacker, ability, targets);
targets.Add(attacker);
result.AffectedEntities = targets;
return(result);
}
/// <summary>
/// Creates an instance of a DelayedAbility.
/// </summary>
/// <param name="attacker">The CombatEntity starting the effect of a DelayedAbility.</param>
/// <param name="ability">The Ability to convert into a DelayedAbility.</param>
/// <param name="action">The object containing details about the action being performed.</param>
/// <param name="targetFormation">The Formation that the CombatEntity is targeting with its action.</param>
/// <returns></returns>
public DelayedAbilityResult CreateDelayedAbility(CombatEntity attacker,
Ability ability,
BattleAction action,
Formation targetFormation)
{
var result = new DelayedAbilityResult();
// Target out of bounds
if (!ability.IsPointBlank && !ability.IsPositionStatic &&
(action.TargetPosition > 9 || action.TargetPosition < 1))
{
result.FailureReason = BattleErrorWriter.WriteTargetPositionOutOfBounds();
return(result);
}
if (!HasEnoughResources(attacker, ability, out string failureReason))
{
result.FailureReason = failureReason;
return(result);
}
int targetPosition = action.TargetPosition;
if (ability.IsPointBlank)
{
targetPosition = GetTargetPosition(attacker, targetFormation);
}
ConsumeResources(attacker, ability);
bool isCrit = IsCritical(attacker, ability);
result.DelayedAbility = new DelayedAbility
{
Actor = attacker,
BaseAbility = ability,
StoredDamage = DamageCalculator.GetDamage(attacker, ability, isCrit),
StoredHealing = DamageCalculator.GetHeal(attacker, ability, isCrit),
TargetFormation = targetFormation,
TargetPosition = action.TargetPosition,
IsCrit = isCrit,
TurnsLeft = ability.DelayedTurns
};
return(result);
}
/// <summary>
/// Performs an ability using the specified parameters.
/// </summary>
/// <param name="action">The object containing the original battle commands.</param>
/// <param name="actor">The CombatEntity performing the ability.</param>
/// <param name="actorFormation">The Formation of the CombatEntity performing the Ability.</param>
/// <param name="isAttacker">Set to true if the CombatEntity is on the attacking side in battle.</param>
/// <param name="ability">The Ability being performed.</param>
/// <param name="result">A reference to the BattleActionResult object.</param>
/// <returns>Returns an IEnumerable of CombatEntities affected by the Ability.</returns>
private IEnumerable <CombatEntity> PerformAbility(BattleAction action,
CombatEntity actor,
Formation actorFormation,
bool isAttacker,
Ability ability,
ref BattleActionResult result)
{
IEnumerable <CombatEntity> affectedEntities;
Item item = null;
// If using an item, prepare item to have it's charges deducted later
if (action.IsUsingItem)
{
item = actor.EquippedItems.FirstOrDefault(i => i.ConsumableAbility.Id == action.AbilityId);
if (item == null)
{
item = actor.PlayerInventory
.Items
.FirstOrDefault(i => i != null && i.ConsumableAbility.Id == action.AbilityId);
}
if (item == null)
{
result.FailureReason = BattleErrorWriter.WriteItemDoesntExist(actor);
result.IsSuccess = false;
return(null);
}
ability = item.ConsumableAbility;
}
// Not an item, check to see if character is restricted from using Ability
else
{
ability = actor.Abilities.FirstOrDefault(abi => abi.Id == action.AbilityId);
if (ability == null)
{
result.FailureReason = BattleErrorWriter.WriteAbilityDoesntExist(actor);
result.IsSuccess = false;
return(null);
}
if (ability.IsSpell && actor.StatusEffects.Any(se => se.BaseStatus.IsSilenced))
{
result.FailureReason = BattleErrorWriter.WriteEntityIsSilenced(actor, ability);
result.IsSuccess = false;
return(null);
}
if (!ability.IsSpell && actor.StatusEffects.Any(se => se.BaseStatus.IsRestricted))
{
result.FailureReason = BattleErrorWriter.WriteEntityIsRestricted(actor, ability);
result.IsSuccess = false;
return(null);
}
}
var targetFormation = GetFormation(action.TargetFormationId, out bool throwAway);
// If the ability has a delay, create a DelayedAbility
if (ability.DelayedTurns > 0)
{
var delayedAbilityResult = _abilityManager.CreateDelayedAbility(actor, ability, action, targetFormation);
if (delayedAbilityResult.DelayedAbility == null)
{
result.FailureReason = delayedAbilityResult.FailureReason;
result.IsSuccess = false;
return(null);
}
if (isAttacker)
{
_battle.AttackerDelayedAbilities.Add(delayedAbilityResult.DelayedAbility);
}
else
{
_battle.DefenderDelayedAbilities.Add(delayedAbilityResult.DelayedAbility);
}
affectedEntities = new List <CombatEntity> {
actor
};
}
// Not a delayed ability, try to apply effects immediately
else
{
var abilityResult = _abilityManager.PerformAbility(actor, ability, action.TargetPosition, targetFormation);
if (abilityResult.FailureReason != null)
{
result.FailureReason = abilityResult.FailureReason;
result.IsSuccess = false;
return(null);
}
affectedEntities = abilityResult.AffectedEntities;
}
CheckForDeadEntities(affectedEntities, targetFormation);
// Action was successful, remove the actor from characters free to act
_battle.ActionsLeftPerFormation[actorFormation].Remove(actor);
// If Ability was granted by an item, reduce the charges of the item
if (item != null)
{
_equipmentManager.ReduceCharges(actor, item);
}
return(affectedEntities);
}
/// <summary>
/// Performs an action and returns true if the action was a success.
/// </summary>
/// <param name="action">The action to perform, containing data about the actor and the abilities used.</param>
/// <returns></returns>
public async Task <BattleActionResult> PerformActionAsync(BattleAction action)
{
IEnumerable <CombatEntity> affectedEntities = null;
CombatEntity nextActiveEntity = null;
Ability ability = null;
CombatEntity actor = null;
var result = new BattleActionResult {
IsSuccess = true
};
lock (_key)
{
if (_battle == null)
{
result.FailureReason = BattleErrorWriter.WriteNotInitiated();
result.IsSuccess = false;
return(result);
}
var actorFormation = GetFormation(action.OwnerId, out bool isAttacker);
if (actorFormation == null)
{
result.FailureReason = BattleErrorWriter.WriteNotParticipating();
result.IsSuccess = false;
return(result);
}
actor = actorFormation.Positions.FirstOrDefaultTwoD(entity => entity != null && entity.Id == action.ActorId);
if (actor == null)
{
result.FailureReason = BattleErrorWriter.WriteActorNotFound();
result.IsSuccess = false;
return(result);
}
// Not player's turn
if (_battle.IsDefenderTurn != !isAttacker)
{
result.FailureReason = BattleErrorWriter.WriteNotPlayersTurn();
result.IsSuccess = false;
return(result);
}
if (!_battle.ActionsLeftPerFormation.ContainsKey(actorFormation))
{
result.FailureReason = BattleErrorWriter.WriteNoMoreActions();
result.IsSuccess = false;
return(result);
}
if (!_battle.ActionsLeftPerFormation[actorFormation].Contains(actor))
{
result.FailureReason = BattleErrorWriter.WriteEntityCannotAct(actor);
result.IsSuccess = false;
return(result);
}
if (actor.StatusEffects.Any(se => se.BaseStatus.IsStunned))
{
result.FailureReason = BattleErrorWriter.WriteEntityIsStunned(actor);
result.IsSuccess = false;
return(result);
}
if (!action.IsDefending &&
!action.IsFleeing)
{
affectedEntities = PerformAbility(action,
actor,
actorFormation,
isAttacker,
ability,
ref result);
if (affectedEntities == null)
{
return(result);
}
}
// Is defending or fleeing
else
{
if (action.IsDefending)
{
affectedEntities = PerformDefend(actor, actorFormation, out nextActiveEntity);
}
else if (action.IsFleeing)
{
affectedEntities = PerformFlee(actor, actorFormation);
}
}
}
await Task.Run(() => SuccessfulActionEvent.Invoke(this, new SuccessfulActionEventArgs
{
Ability = ability,
Action = action,
Actor = actor,
AffectedEntities = affectedEntities,
ParticipantIds = _participantIds,
NextActiveEntityId = nextActiveEntity != null ? nextActiveEntity.Id : -1
}));
return(result);
}
